Automatic pressure gauge



Nov. 15, 1932. H. E. PLATT 1,887,821

AUTOMATIC PRESSURE GAUGE Filed Jan. 21, 1929 INVENTOR .ZLPlafl' ATTORNEYG Patented Nov.'15, 1932 -.,,UN,I,TED STATES ,1 BARB E. PLATT, oro'rirnmwa, IOWA "-au'rona'rrc PRESSURE GAUGE f Application filedJ'anuary21,fl1929. Serial No, 333,967.

My invention relates to improvements in automatic pressure gauges, andit consists in the combinations, constructions, and arrangements hereindescribed and claimed.

An object of my invention is to provide an automatic pressure gaugewhich may be used for air, gas, steam, or liquids, but which isespecially adapted'for use in connection with pressure tanks for passingair under pressure into vehicle tires.-

A further object of myinvention is to provide a device of the type.described which may be adjusted-so as to allow a predetermined amount ofair under pressure to enter the tire. A 5 further object of my inventionis to provide a device of the type described in which the adjustingmeans is disposed where it can be readily actuated.

A further object of ,my' invention is to provide a device of the typedescribed which hasnovel means-for indicating to the operator when themain valve is opened and when the main valve is closed. 7

7 Other objects and advantages will appear in the followingspecification, and'the novel features of the invention will beparticularly pointed out in the appended claims.

My invention is illustrated in the accom panying drawing forming. partof this application, in which 4 I Figure 1 is a vertical sectional viewof my device, portions thereof being shown in elevation, f 1 V .Figure 2is atop plan view of a portion of my device, I i V Figure 3 isanenlarged detail view of a signalling means, and i Figure 4 is asectional view takenalong the I line l- 4 of Figureil. I

Incarrying out my invention I provide a body portion 1, having a maininlet-passage way-2 and an outlet passageway 3 separated fromeach otherby means-of a partition ,4

but arranged to communicate with each other through an opening 5provided in the partition. A cylinder 6 is provided inthe body portion1, and is provided with an open end 7 whichis arranged to receive acover 8.

. A valve piston 9 is movably disposed in the cylinder Band isprovided'with stop menu-- spring supporting piston 11-. q A signallingmeansis prov bers 10 which extend upwardly and are "are ranged toengagewith the cover 8.1 A spring supporting rpiston 11 is movably disposedinthe cylinder ,6 and is provided with a center opening12fl Avalve stem13, "whichhas' a main valve 1 1 mounted upon oneend, slidably extendsthrough the opening 12 and has the otherend rigidly secured to thevalvepiston 9. A compression spring 15 is disposed between the twopistons 9 andll. -An actuating lever 16 has one end] con nected tothebody portion by means of a connectinglink 17. Supporting arms-18 arerigidly carried by the cover 8and pivotally support. actuating links 19.The actuating links 19 each have one of their ends zpivotally jconnectedto the lever 16 .at amend their 2vother ends operatively. connected i Q{draw rods 21. The draw rods 21 are slidably disposed in packing members22 whichare cart;w

ried by the cover 8. The draw rods 2l slidablyextend through thevalve'piston 9 and have their inner ends rigidly secured tofthe whistle.portion 2%]: disposed therein. This tubular portion is carried by thecover; 8 and is provided withan air inlet opening '25. An

inner tubular member 26 is carried by the;

when opened. 'Aby-pass 29 is disposedin the body portion 1 for providingcommunication between the passageway 3 andthe upper portion of thecylinder 6.

An indicating. arm 30 is pivotally secured to the body portion -1 at 31and is provided with a plurality of teeth 32. Theteeth .32

ided and is com-Q posed of an outertube 23having a cut-away providenotches .33 adjacent to which are disposed indicating lines -34. Theindicating arm 30 extends through an opening35 in the I lever 16. Atongue member 36 is carried by under pressure to the body portion. Letus further assume that the operator wishes to pass air under pressureinto'a-tireruntil the pressurein the tire has reached forty pounds.

The operator will first force the lever 16 downwardly by pressing uponthe handle portion 39'until the tongue portion 36 is disposed in thenotch 33 adjacent the indicating line numbered40 upon the indicating arm30. By pressing the lever 16 downwardly, the draw rods 21 will be movedupwardly thus moving the spring supporting piston 11 upwardly in thecylinder 6, The tension of the spring 15 will also force the piston 9upwardly carrying with it the valve. 14. The movement of the piston 9 inthe upward direction is limited by means of the stop members lOlso thatthe piston 9 will atall times be positioned beneaththe outlet of theby-pass 29. If the piston 11 is moved upwardly a greater distance thanthe piston 9 is allowed to move, the spring 15 willbe compressed totake'care of this additional movement of thepiston 11.

When the main valve 14 is moved away from the openingt, the air underpressure is allowed to pass from the inlet passageway 2, through theopening 5, and into the passageway 3. By connecting the end of the bodyportion adjacent the valve 28 with the valve stem of the vehicle tire,the valve 28 will be moved from its seat thus allowing the air underpressure to enter the tire. The

air under pressure will continue to pass into the tire until thepressure in the tire has reached forty pounds. The pressure in theoutlet passageway, 3, the .by-pass 29, and the cylinder 6 will be thesame as in the tire. The spring 15 is of such a tension that'the mainvalve 14 will beheld open until the predetermined amount of air haspassed into the tire. This predetermined amount of air will besuiiicient pressure to force the'pi'ston 9 downwardly against thetension of the spring and close the valve'14.

During the movement of the valve 9 in the upward direction the opening27 of the sig nailing means will align with the opening 25 and then passbeyond the opening 25.

. When the opening 27 is in alignment with r the opening'25 a portion ofthe air underpressure will pass through these openings and through theopening 24 creating a whistling I sound. This sound will notify theoperator that the main valve 14 has been opened. After the desiredamount of air has passed into the'tire the piston 9 is forced downwardlythus closing the main valve 14. The openbetweensaid inlet and outletpassageways,

said partitioning portion having an opening therethrough, a valve membernormally disposed in said opening and seating on said partitioningportion, said body'portion being provided. with a cylinder," a cylinderhead removably connected with the body portion, an upper and a lowerpiston member movably disposed in said cylinder in spaced-apartrelation, spring means disposed between said spaced-apart pistonmembers, said upper piston member being provided with stop members forlimiting the movement thereof, said body portion having a passageway forproviding communication between the outlet passageway andsaid cylinderbetween the upper'piston member and the cylinder head,

said main valve'being provided with a valve stem slidably extendingthrough said lower piston member and fixedly connected with the upperpiston member, a'pair of actuating rods fixedly connected withsaid lowerpiston member and slidably extending through said upper piston memberand'the cylinder head,

an actuating. lever, -link means operatively connecting said actu atinglever with the body through an opening in said actuating lever, said armbeing provided with indicia opposite the notches, and means mounted onsaid lever for engaging the notch-es-of said indicating arm. H

2. 'A device of the type described comprising a body portion having aninlet passageway and an outlet passageway, said body portion having apartitioning portion disposed between said inlet and outlet passageways,said partitioning portion having an opening therethrough, a valve'membernormally disposed in said opening and seating on said partitioningportion, said body portion being provided with a cylinder, a cylinderhead removably connected with the body portion, an upper and a lowerpiston member movably disposed in said cylinder in spaced-apartrelation, spring means disposed between said spaced-apart pistonmembers, said upper pisi'ton member being provided with stop members forlimiting the movement thereof, said body portion having a passageway forproviding communication between the outlet passageway and said cylinderbetween the upper piston member and the cylinder head, said main valvebeing provided with a valve stem slidably extending through said lowerpiston member and fixedly connected with the u per piston member, a pairof actuating ro s fixedly connected with said lower piston member andslidably extending through said upper piston member and the cylinderhead,

an actuating lever, link means operatively connecting said actuatinglever with the body portion and the actuating rods, a notched indicatingarm having one end movably connected with the body portion and extendingthrough an opening in said actuating lever,

said arm being provided with indicia opposite the notches, means mountedon said lever for engaging the notches of said indicating arm, and anauditory signaling means operatively connected with said upper pistonmember and adapted for being actuated when said piston is moved.

Signed at Ottumwa in the county of Wapello and State of Iowa this 17thday of January A. D. 1929. I

' HARRY E. PLATT.

